01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package java.beans;
19:
20: import java.lang.reflect.Method;
21:
22: /**
23: * Persistence delegate for {@link java.lang.reflect.Method} class.
24: */
25: class MethodPersistenceDelegate extends PersistenceDelegate {
26: @Override
27: protected Expression instantiate(Object oldInstance, Encoder out) {
28: // should not be null or have a type other than Method
29: assert oldInstance instanceof Method : oldInstance;
30: Method oldMethod = (Method) oldInstance;
31: Class<?> declClass = oldMethod.getDeclaringClass();
32: return new Expression(oldMethod, declClass, "getMethod", //$NON-NLS-1$
33: new Object[] { oldMethod.getName(),
34: oldMethod.getParameterTypes() });
35: }
36:
37: @Override
38: protected void initialize(Class<?> type, Object oldInstance,
39: Object newInstance, Encoder out) {
40: // check for consistency
41: assert oldInstance instanceof Method : oldInstance;
42: assert newInstance instanceof Method : newInstance;
43: assert newInstance.equals(oldInstance);
44: }
45:
46: @Override
47: protected boolean mutatesTo(Object oldInstance, Object newInstance) {
48: assert oldInstance instanceof Method : oldInstance;
49: if (!(newInstance instanceof Method)) {
50: // if null or not a Method
51: return false;
52: }
53: return oldInstance.equals(newInstance);
54: }
55: }
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